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Feasibility Analysis of Tripping in Small Current Grounding System
Applied Mechanics and Materials, 2011 With the development of integrated automation systems and distribution automation technology, considering the safety of grid equipment, the voltage security of low-voltage power grid, personal safety and the characteristics of small current grounding system , this paper points out that still follow the old rules that run 0.5-2 hours allowed in dealing ...
Yi Shi Shu, Li Li Ma, Pei Jie Yu
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Protection method of small current grounding system based on phase current variation
2020 IEEE 4th Conference on Energy Internet and Energy System Integration (EI2), 2020 The probability of single-phase earthing fault is very high in indirectly grounding power system, so it is very important to select and trip the fault line quickly. According to the theoretical analysis, the difference between the faulty phase current’s variation and the non faulty current’s variation of the faulty feeder is significantly larger than ...
Xiaobing Ding +5 more
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Resonance Analysis of Small Current Grounding System in Distribution Network
2018 China International Conference on Electricity Distribution (CICED), 2018 At present, there are a large number of arc suppression coil grounding mode in the low-voltage distribution network for the equipment insulation and power supply reliability considerations. The role of arc suppression coil grounding mode is when the grid single-phase ground fault occurs, arc suppression coil will provide inductor current to compensate ...
Zhou Desheng +5 more
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2021 IEEE 5th Advanced Information Technology, Electronic and Automation Control Conference (IAEAC), 2021 In order to improve the line selection accuracy of the fault line selection device for small current grounding systems, a line selection method based on information fusion is proposed, that is, several complementary single line selection methods based on transient and steady state characteristics are used for comprehensive line selection.
Qi Liu +4 more
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Single-phase grounding test sequence fault location method for small current grounding system
2020 4th International Conference on HVDC (HVDC), 2020 A method for Single-phase grounding test sequence fault location method for small current grounding system is proposed, which aims to compensate for the incomplete or faulty signal of the line ground fault signal when the fault area in the line is located in the prior art.
Zhao Haifeng +5 more
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A new method of fault location for small current to ground system
2010 IEEE International Conference on Intelligent Computing and Intelligent Systems, 2010A new principle of fault location is proposed in this paper, which utilized the transient zero-mode power when the fault occurred. The waveforms of transient zero-mode power are similar at the two ipsilateral points of fault point, and the correlation coefficient is close to 1; but the initial polarity of transient zero-mode power is opposite at the ...
Shu Tian, Xiao-wei Wang, Juan-juan Wang
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Research on Ferroresonance Detection in Small Current Neutral Grounding System
Advanced Materials Research, 2013A novel method to detect ferroresonance was proposed based on the drastic characteristics of the electromagnetic voltage transformer (PT) current rate. This scheme takes current rate which is greater than a threshold value as starting signal and judges the occurrence of resonance by detecting duty ratio of the peaks and interval angles.
Qing Chao Zhang +3 more
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The Summarization of Fault Line Selection of Small Current Grounding System
Applied Mechanics and Materials, 2014With the development of power technology and the improvement of reliability of power supply of power user requirement, small current grounding system become the main grounding mode of distribution network. Small current grounding power system fault line selection is always one of the puzzles in medium voltage distribution network relay protection ...
Zhi Xia Zhang, Zhi Lei Wang, Kun Li
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2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia), 2019
It is difficult to select fault line accurate when single phase grounding faults occur in small-current ground system. The manuscript proposed a novel fault line selection scheme base on reactive current. According to theoretical analysis, the variation of current after the occurrence of single phase short circuit is mainly composed of capacitive ...
Li Shilong +4 more
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It is difficult to select fault line accurate when single phase grounding faults occur in small-current ground system. The manuscript proposed a novel fault line selection scheme base on reactive current. According to theoretical analysis, the variation of current after the occurrence of single phase short circuit is mainly composed of capacitive ...
Li Shilong +4 more
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